CN105977404A - Electrochemical cell and electrochemical cell with terminal - Google Patents

Electrochemical cell and electrochemical cell with terminal Download PDF

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Publication number
CN105977404A
CN105977404A CN201610139287.5A CN201610139287A CN105977404A CN 105977404 A CN105977404 A CN 105977404A CN 201610139287 A CN201610139287 A CN 201610139287A CN 105977404 A CN105977404 A CN 105977404A
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China
Prior art keywords
electrochemical cell
negative electrode
anode cover
electrode casing
terminal
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CN201610139287.5A
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Chinese (zh)
Inventor
小野寺英晴
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Seiko Instruments Inc
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Seiko Instruments Inc
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Publication of CN105977404A publication Critical patent/CN105977404A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/109—Primary casings; Jackets or wrappings characterised by their shape or physical structure of button or coin shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22—Electrodes
    • H01G11/30—Electrodes characterised by their material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/52—Separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/54—Electrolytes
    • H01G11/58—Liquid electrolytes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/74—Terminals, e.g. extensions of current collectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/78—Cases; Housings; Encapsulations; Mountings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/117—Inorganic material
    • H01M50/119—Metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/121—Organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
    • H01M50/145—Primary casings; Jackets or wrappings for protecting against damage caused by external factors for protecting against corrosion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
    • H01M50/171—Lids or covers characterised by the methods of assembling casings with lids using adhesives or sealing agents
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/562—Terminals characterised by the material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/13—Energy storage using capacitors

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

A coin type (button type) electrochemical cell is configured of a negative electrode can configuring a negative electrode side and a positive electrode can configuring a positive electrode side. Then, the negative electrode can and the positive electrode can are formed of non-magnetic stainless steel which does not have magnetic properties due to plastic processing. Specifically, the negative electrode can and the positive electrode can are formed by using high manganese stainless steel or SUS305 having a high nickel (Ni) content. In this way, the negative electrode can and the positive electrode can are formed of non-magnetic stainless steel which maintains non-magnetic properties even after being processed into the shape of a coin, and thus it is possible to provide a non-magnetic electrochemical cell, and as a result thereof, it is possible to provide an electrochemical cell which is not affected even at the time of being arranged in the vicinity of a magnet.

Description

Electrochemical cell and the electrochemical cell with terminal
Technical field
The present invention relates to electrochemical cell and the electrochemical cell with terminal, such as, be directed to use with the metal of Coin shape The electrochemical cell of container and the electrochemical cell with terminal.
Background technology
The battery of so-called Coin shape or this electrochemical cell of double-layer capacitor are widely used for including portable electricity Memorizer in the various portable equipments of words or the mobile communicating equipment such as digital camera or the stand-by power supply of clock function etc. are (specially Profit document 1).
The electrochemical cell of such Coin shape possesses storage electrode or the container of electrolyte, owing to this container has both conduct For making the function of collector body that electronics self-electrode comes in and goes out, thus generally use metal shell.
Wherein, one-shot battery uses the cold-rolled steel sheet based on ferrum or corrosion resistant plate.Chargeable secondary cell or electricity Double layer capacitor uses the more excellent austenitic stainless steel of corrosion resistance or austenite/ferrite class two phase stainless steel or will not Rust steel plate and the metal clad board of aluminum crimping.
Additionally, the SUS329J4L as ferrum or austenite/ferrite class two phase stainless steel is strong magnetic material.
It addition, SUS304 or SUS316L of austenitic type is nonmagnetic substance, but these materials become coin in plastic working During the shape of type, one part is transformed into the magnetic martensite of band, and band is magnetic.
As a result of which it is, corrosion resistant plate to be processed into the existing electrochemical cell of Coin shape shape, anode cover, negative pole Shell all bands are magnetic.
But, electrochemical cell is sometimes used as to use magnet or the motor of electromagnet or the power supply of actuator.And, for Make to utilize the device miniaturization of these magnets or electromagnet, sometimes must near magnet configuration electrochemical cell.
Therefore, the container of existing electrochemical cell is adsorbed in magnet owing to band is magnetic, it is possible to motor or cause The operating of dynamic device impacts.
Patent documentation 1: Japanese Unexamined Patent Publication 2011-210898 publication.
Summary of the invention
The problem that invention is to be solved
It is an object of the invention to, it is provided that the nonmagnetic electrochemistry operating of such as motor or actuator etc. not impacted Battery and the electrochemical cell with terminal.
For solving the scheme of problem
(1) in invention as claimed in claim 1, it is provided that a kind of electrochemical cell, it is characterised in that possess: negative electrode casing；Just Pole shell, seals with described negative electrode casing via insulant, forms receiving portion together with described negative electrode casing；1st electrode, described Described negative electrode casing it is disposed in receiving portion；2nd electrode, is disposed in described anode cover in described accommodation section；Spacer, is disposed in Between described 1st electrode and described 2nd electrode, both are made to insulate；And electrolyte, it is filled in described accommodation section, described negative Pole shell and described anode cover are non magnetic.
(2) in invention as claimed in claim 2, it is provided that electrochemical cell as claimed in claim 1, its feature exists In, described negative electrode casing and described anode cover are by not carrying magnetic non-magnetic stainless steel to be formed because of plastic working.
(3) in invention as claimed in claim 3, it is provided that electrochemical cell as claimed in claim 2, its feature exists In, described negative electrode casing and described anode cover are formed by high manganese stainless steel or high nickel and stainless steel.
(4) in invention as claimed in claim 4, it is provided that the electrochemistry as described in any one in claims 1 to 3 Battery, it is characterised in that described negative electrode casing and described anode cover are made up of bottom and side surface part, described negative electrode casing and described positive pole At least one party of shell, at whole with the inside bottom surface of the bottom of described electrolyte contacts, is formed and has described electrolyte The protecting film of corrosion proof electric conductivity.
(5) in invention as claimed in claim 5, it is provided that electrochemical cell as claimed in claim 4, its feature exists In, described protecting film forms the inner side surface to described side surface part.
(6) in invention as claimed in claim 6, it is provided that the electrochemical cell as described in claim 4 or 5, it is special Levy and be, described protecting film based on carbon, aluminum, conduction DLC, electric conductive polymer any one.
(7) in invention as claimed in claim 7, it is provided that a kind of electrochemical cell with terminal, it is characterised in that Possess the electrochemical cell as described in any one in claim 1 to 6, positive terminal and negative terminal, described positive terminal Sub and described negative terminal is non magnetic.
(8) in invention as claimed in claim 8, it is provided that the electrochemistry electricity with terminal as claimed in claim 7 Pond, it is characterised in that described positive terminal and described negative terminal are magnetic non magnetic stainless by not carrying because of plastic working Steel is formed.
The effect of invention
(1) according to the present invention, owing to negative electrode casing and anode cover are non magnetic, it is thus possible to as not to motor or actuator etc. The nonmagnetic electrochemical cell that operating impacts.
(2) according to the invention as described in claim 4 to claim 6, owing to being formed with, there is corrosion proof electric conductivity Protecting film, thus in nonmagnetic electrochemical cell, it can be ensured that sufficiently corrosion resistance.
(3) according to the invention as described in claim 7 to claim 8, owing to being installed on nonmagnetic electrochemical cell Terminal also formed by nonmagnetic substance, it is thus possible to as the nonmagnetic electrochemical cell with terminal.
Accompanying drawing explanation
Fig. 1 is the section constitution figure of the electrochemical cell (double-layer capacitor) in the 1st embodiment.
Fig. 2 is the section constitution figure of the electrochemical cell (double-layer capacitor) in the 2nd embodiment.
Fig. 3 is the section constitution figure of the electrochemical cell (double-layer capacitor) in the 3rd embodiment.
Fig. 4 is the section constitution figure of the electrochemical cell (double-layer capacitor) in the 4th embodiment.
Fig. 5 is the section constitution figure of the electrochemical cell (double-layer capacitor) in the 5th embodiment.
Fig. 6 is the side of the electrochemical cell with terminal of the electrochemical cell that terminal is arranged on the present invention Figure.
Fig. 7 is the explanatory diagram of the test result representing whether magnet is adsorbed in electrochemical cell.
Fig. 8 is to represent each embodiment and the composition of comparative example and the explanatory diagram of evaluation result.
Detailed description of the invention
Hereinafter, referring to figs. 1 through Fig. 8, the suitable embodiment in the electrochemical cell of the present invention is said in detail Bright.
(1) summary of embodiment
In the present embodiment, negative electrode casing 10 and the anode cover 20 constituting side of the positive electrode by constituting negative side constitute Coin shape (knob Button-type) electrochemical cell.
And, formed negative electrode casing 10 and positive pole by even with plastic working without magnetic non-magnetic stainless steel Shell 20.Specifically, high manganese stainless steel or the many SUS305 of nickel (Ni) amount is used to form negative electrode casing 10 and anode cover 20.
So, owing to also maintaining nonmagnetic non-magnetic stainless steel to form negative electrode casing 10 He after being processed into Coin shape Anode cover 20, it is thus possible to provide nonmagnetic electrochemical cell, even if as a result of which it is, can providing and be configured at the attached of magnet Closely, the electrochemical cell not impacted.
Additionally, the most also maintain nonmagnetic non-magnetic stainless steel, used with anode cover all the time SUS329J4L compares, and corrosion resistance is low.
Therefore, in the present embodiment, in order to improve corrosion resistance further, in addition to making the two poles of the earth shell be non magnetic, also It is right to be formed in the face with electrolyte contacts of one or both of the negative electrode casing 10 formed by non-magnetic stainless steel and anode cover 20 Electrolyte has the protecting film of corrosion proof electric conductivity.
Additionally, in the case of conductive protective is formed at either one, is preferably formed in and requires higher corrosion resistance Anode cover.
Negative electrode casing 10 and anode cover 20 possess and continuous print side, bottom surface (side face) respectively, and this side face is via as insulation material The pad of material and seal, thus the most not with electrolyte contacts, even if but in order in the reason due to impact or expansion etc. Cause electrolyte to be temporarily submerged to side surface part, also ensure that corrosion resistance, preferably also form electric conductivity at side (side face) Protecting film.
As the protecting film of electric conductivity, use the film being made up of the mixture of carbon and resin, aluminum film, the DLC that conducts electricity Any one of (diamond-like carbon, diamond like carbon) film, electric conductive polymer film etc..
(2) details of embodiment
As the electrochemical cell 1 in present embodiment, it is possible to be applicable to silver oxide cell, alkaline manganese battery, lithium primary battery, The various electrochemical cell such as lithium secondary battery or double-layer capacitor.
Fig. 1 is the section constitution figure of the Coin shape double-layer capacitor (electrochemical cell) 1 being suitable for present embodiment.
Double-layer capacitor 1 forms the profile of Coin shape (coin shape), possesses work as negative electrode collector negative Pole shell 10 and the anode cover 20 worked as positive electrode collector.
1st electrode 11, the 2nd electrode 21, spacer 30, electrolyte 31 etc. are enclosed via pad 32.
Negative electrode casing 10 possesses the bottom 10a of circle and side surface part 10b of the periphery connection along bottom 10a, is formed with tool There is the recess of the peristome of circle, as entirety, be discoid and nonmagnetic metal container.
Negative electrode casing 10 works as the lid of double-layer capacitor 1.
The open side of side surface part 10b of negative electrode casing 10 embeds the wall of the pad 32 being formed at circular (bagel shape) The recess (groove) of thickness portion.
Pad 32, such as by resin formation, is disposed in anode cover 20 and negative pole throughout the complete cycle of peristome of anode cover 20 Between shell 10.Pad 32 by airtight inclosures such as internal electrolyte, and, make anode cover 20 and negative electrode casing 10 insulate.
Side surface part 20b that the anode cover 20 periphery by circular bottom 20a with along bottom 20a connects is formed has circle The recess of peristome, as entirety, be discoid and nonmagnetic metal container.Anode cover 20 is as double-layer capacitor The outer casing of 1 and work.
The diameter of the peristome of side surface part 20b is formed larger than the external diameter of pad 32, at the pad embedding negative electrode casing 10 Under 32 states contacted with the bottom 20a of anode cover 20, seal by side surface part 20b is riveted from outer circumferential side.
Additionally, below the material of the negative electrode casing 10 formed in present embodiment and anode cover 20 is illustrated.
In the inside bottom surface of the bottom 10a of negative electrode casing 10, connected by conductive adhesive 12 and have the 1st electrode of circle 11, in the inside bottom surface of the bottom 20a of anode cover 20, connected by conductive adhesive 22 and have the 2nd electrode 21 of circle.? In present embodiment, the 1st electrode the 11 and the 2nd electrode 21 is adhered to the bottom 10a of the negative electrode casing 10 and bottom 20a of anode cover 20.
Between the 1st electrode the 11 and the 2nd electrode 21, it is equipped with the spacer 30 being made up of insulant.That is, the 1st electrode The face of the face of the side not being adhered to negative electrode casing 10 of 11 and the side not being adhered to anode cover 20 of the 2nd electrode 21 is via isolation Thing 30 and be opposed to arrange.
It addition, electrolyte 31 is filled in the double-layer capacitor 1 sealed by negative electrode casing 10 and anode cover 20.
About the 1st electrode the 11, the 2nd electrode 21, spacer 30 and electrolyte 31, it is possible to use well-known various material Material, in the present embodiment, as an example, uses following material.
That is, the 1st electrode the 11, the 2nd electrode 21 all uses the mixture of activated carbon, carbon black, PTFE.
Spacer 30 uses polyolefin micro porous polyolefin membrane.
It addition, electrolyte 31 uses the mixture of nonaqueous solvent and electrolyte.
It addition, pad 32 uses the various resins such as polyethylene, polypropylene, polyphenylene sulfide, polyether-ether-ketone.
Then, the metal material forming negative electrode casing 10 and anode cover 20 is illustrated.
Negative electrode casing 10 and anode cover 20 are all by the most also maintaining nonmagnetic non-magnetic stainless steel to be formed, and both also may be used To be formed by same material, it is also possible to formed by respective material.Negative electrode casing 10 and anode cover 20 use such as high manganese stainless steel Or the many SUS305 of nickel amount is formed.Such as, about non-magnetic stainless steel plate, following shown corrosion resistant plate is commercially Sell.
(1) " the NAS NM15M " and " NAS NM17 " that NAS steel band (Na ス (strain)) is made
Being all the austenitic stainless steel of Gao Meng, its chemical composition (unit (w%)) is as follows.
(a) " NAS NM15M " C:0.040～0.090, Si :≤0.90, Mn:14.00～15.00, P :≤0.045, S: ≤ 0.015, Ni:4.00～4.60, Cr:16.50～17.50, N:0.30～0.35
(b) " NAS NM17 " C :≤0.10, Si :≤1.00, Mn:16.00～17.00, P :≤0.045, S :≤0.015, Ni: 7.00～8.00, Cr:16.00～18.00, N :≤0.20
(2) particulate metal EXCEL((strain) particulate metal エ Network セ Le) " SUS305M " that make
Being nickelic austenitic stainless steel, its chemical composition (unit (%)) is as follows.
C:0.07～0.09, Si:0.60～1.00, Mn:1.40～1.80, P :≤0.045, S :≤0.030, Cr:18.00 ～19.00, Ni:12.00～13.00
(3) " the SUS XM7 ", " SUS 305M1 " and " SUS 305M3 " that day brand-new steel ((strain) day is new) is made
Being nickelic austenitic stainless steel, its chemical composition (unit (%)) is as follows.
(a) " SUS XM7 " C:0.035, Si:0.55, Mn:1.80, P:0.025, S:0.004, Ni:9.40, Cr: 18.25, Mo:0.12, Cu:3.20, N:0.03
(b) " SUS 305M1 " C:0.04, Si:0.82, Mn:3.19, P:0.021, S:0.004, Ni:11.76, Cr:16.1
(c) " SUS 305M3 " C:0.060, Si:0.58, Mn:2.93, P:0.032, S:0.004, Ni:12.24, Cr:18.72, N:0.150
Each rustless steel of example provided above explanation is all an example, if even if using the negative pole carried out by punching press etc. Also maintain nonmagnetic rustless steel after the processing of shell 10 and anode cover 20, also then be able to use other chemical compositions, other companies Goods.Alternatively, it is also possible to use metal clad board non-magnetic stainless steel and aluminum crimped.
Then, other embodiments are illustrated.
In the 1st embodiment, following situation is illustrated: use as also maintaining non-magnetic after plastic working High manganese or the nickelic austenitic stainless steel of the non-magnetic stainless steel of property process negative electrode casing 10 and anode cover 20, thus, as Entirety, constitutes nonmagnetic electrochemical cell 1.
But, these high manganese or nickelic austenitic stainless steel, the SUS329J4L phase used with anode cover all the time Ratio, corrosion resistance is low.
Therefore, in other present embodiments, in order to improve corrosion resistance further, except making negative electrode casing 10 and anode cover 20 Outside non magnetic, the also medial surface at bottom 10a, 20a of contacting with electrolyte 31 is formed and electrolyte 31 is had corrosion resistance The protecting film of electric conductivity, thus, improve the corrosion resistance of the two poles of the earth shell 10,20.
As the material of protecting film, use carbon, aluminum, conduction DLC(diamond-like carbon, diamond like carbon), conduction Any one of property polymer.
Protecting film is formed at negative electrode casing 10 and at least one party of anode cover 20, in the case of being formed at a side, preferably shape Become to require higher corrosion proof anode cover 20 side.Situation the both sides that protecting film is formed at negative electrode casing and anode cover Under, it is also possible to it is the same protecting film in said protection film, it is also possible to be different protecting film.
Negative electrode casing 10 is electrically connected with the 2nd electrode 21 by protecting film with the 1st electrode 11 or anode cover 20, thus preferably conduction The material that property is good.
Additionally, it is preferred that protecting film does not decomposes because of electrolyte 31 or charging current.
Furthermore it is preferred that not Electolyte-absorptive 31 or there is not the film of pin hole.Because, if there is pin hole, then electrolyte 31 Contact with negative electrode casing 10 or anode cover 20 and corrode.In order to reduce pin hole, need to form protecting film thicklyer.On the other hand, as Really protecting film is blocked up, then the volume occupied in receiving portion becomes big, thereby, it is possible to the quantitative change of the electrode accommodated is few, electric capacity diminishes.Cause This, the thickness of protecting film is preferably 0.1～100 μm, more preferably 2～60 μm.It addition, protecting film is the most non magnetic.
Such as, the cream being made up of phenolic resin, carbon and solvent it is coated on applicator surface and makes its thermmohardening, forming carbon and protect Cuticula.As carbon, it is possible to use graphite or carbon black etc..It addition, these various material with carbon elements multiple combination can be used.These Carbon uses nonmagnetic material.
Such as, aluminum protecting film is formed by aluminum is deposited with.As aluminum, it is 99% except containing by ratio of components metering Beyond the fine aluminium of above aluminum, additionally it is possible to the aluminium alloy of the elements such as use Mg, Mn, Si, Cu containing trace.These aluminum is preferably Non magnetic.
Conduction DLC protecting film is bonded diamond or the amorphous thin film combining graphite.Such as, make acetylene gas or contain The unstrpped gas of the hydrocarbons such as benzene gas is plasmarized, forms this thin film by CVD or PVD etc..These DLC film are preferably Non magnetic.
Electric conductive polymer protecting film is the macromolecular compound with electrical conductivity, for instance, it is possible to use polythiophene class Or polyacetylene class etc..It addition, the polystyrene Sulfonate (poly that will adulterate to improve electric conductivity can be used (styrenesulfonate) (PSS)) aqueous dispersions be coated on poly-3,4-ethene dioxythiophene (Poly (3,4- Ethylenedioxythiophene) (PEDOT)) and make it be dried and the protecting film (PEDOT/PSS) that formed.Can apply and make Water or the dispersion liquid of organic solvent dispersion also make it harden or are dried and form these electric conductive polymers.
It addition, in addition to these materials, be properly added and use various interpolation to improve screening characteristics or electric conductivity Agent is also preferred mode.These electric conductive polymer films are the most non magnetic.
Fig. 2 represents the section constitution of the double-layer capacitor 1 in the 2nd embodiment.
The anode cover 20 that the double-layer capacitor 1 of the 2nd embodiment is high to corrosion proof necessity, 20a bottom it Inside bottom surface is formed with protecting film 23.
According to the 2nd embodiment, owing to being formed with the protecting film of electric conductivity in the inside bottom surface of the bottom 20a of anode cover 20 23, it is thus possible to reduce anode cover 20 and the contact of electrolyte 31 and prevent the corrosion of anode cover 20.
Fig. 3 represents the section constitution of the double-layer capacitor 1 in the 3rd embodiment.
In the double-layer capacitor 1 of the 2nd embodiment, the inside bottom surface of the bottom 20a in anode cover 20 is formed The situation of protected film 23 is illustrated, and the double-layer capacitor 1 in the 3rd embodiment expands protecting film 23 further Forming range.
As it is shown on figure 3, at the anode cover 20 of double-layer capacitor 1, be formed with protecting film 24, protecting film 24 is not only expanded to The inside bottom surface of bottom 20a, but also it is expanded to the inner side surface of side surface part 20b.
According to the 3rd embodiment, owing to the region that formed of protecting film is not only expanded to the inside bottom surface of bottom 20a, But also be expanded to the inner side surface of side surface part 20b and formed, even if thus electrolyte 31 be impregnated with between pad 32 to In the case of inner side surface, it is also possible to prevent the corrosion of the anode cover 20 as positive electrode collector.
Fig. 4 represents the section constitution of the double-layer capacitor 1 in the 4th embodiment.
In the double-layer capacitor 1 of the 4th embodiment, the inside bottom surface of the bottom 20a in anode cover 20 whole Body forms protected film 23, and, the entirety of the inside bottom surface of the bottom 10a in negative electrode casing 10 is also formed with protecting film 13.
According to the double-layer capacitor 1 of the 4th embodiment, even if positive pole and negative pole are being connected (charging) on the contrary by mistake In the case of, it is also possible to prevent the corrosion of the negative electrode casing 10 connected on the contrary.
Fig. 5 represents the section constitution of the double-layer capacitor 1 in the 5th embodiment.
In the double-layer capacitor 1 of the 5th embodiment, anode cover 20 being formed with protecting film 24, protecting film 24 is not But it is expanded to the entirety of the inside bottom surface of 20a bottom it, but also is expanded to the inner side surface of side surface part 20b.
It addition, anticathode shell 10 is formed with protecting film 14, protecting film 14 is expanded to the whole of the inside bottom surface of 10a bottom it Body, the inner side surface of side surface part 10b and with this inner side surface continuous print turn back part lateral surface.Can also be by protecting film 14 Forming range formed to turn back part front, i.e. be not formed at lateral surface.
Double-layer capacitor 1 according to the 5th embodiment, it is possible to improve further and positive pole and negative pole are connected on the contrary by mistake Connect the corrosion resistance in the case of (charging).
Fig. 6 represents that the electrochemical cell in the embodiments of the present invention is provided with the electrochemistry electricity with terminal of terminal The composition in pond.As an example, it is shown that the electrochemistry that two electrochemical cells 1 are connected in series via connection member 50 Battery module.
The anode cover side surface part of the negative electrode casing planar portions of the battery of downside and the battery of upside is via a connection member 50 And welding.That is, connection member 50 is made up of flat part and bending section, and the negative electrode casing planar portions of the battery of flat part and downside is molten Contact 40 welding, the anode cover side surface part of the battery of bending section and upside is in fusion point 41 welding.
It addition, positive terminal 60 is in the anode cover side surface part welding of fusion point 42 with the battery of downside, negative terminal 70 exists The negative electrode casing planar portions welding of the battery of fusion point 43 and upside.
The electrochemical cell having terminal about this, not only each electrochemical cell 1 is formed by nonmagnetic material, and And, connection terminal 50, positive terminal 60, negative terminal 70 are the most all formed by nonmagnetic material.Thus, with the electricity of terminal Chemical cell entirety becomes non magnetic.
In particular it is preferred to the above-mentioned magnetic various non-magnetic stainless steel that do not carries because of processing is used as nonmagnetic material Material.
Then, the embodiment of electrochemical cell involved in the present invention is illustrated.
First, in an embodiment, one-shot battery or the electrochemical cell such as secondary cell, double-layer capacitor are used Anode cover, negative electrode casing, the respective material of electrode material, make to have the samarium-cobalt magnet contact of the magnetic force comparing strength, carry out Whether each material is adsorbed in the test of magnet.
Fig. 7 represents the test result whether magnet adsorbs.
In the figure 7, using the material that is not adsorbed in magnet as " O ", using be weaker adsorbed in magnet material as " △ ", Using be adsorbed in magnet material as "×", the material being strongly adsorbed in magnet is evaluated as " ×× ".
In the figure 7, the evaluation after the rustless steel of anode cover and negative electrode casing illustrates processing shelling.It addition, about electrode material Material, in addition to Li, after the weight ratio mixing that the powder of each material and resin press 9:1, shapes with pellet, make magnet and This contacts and evaluates.About Li, magnet is made directly to contact Li paper tinsel and evaluate.
Result for anode cover and the material of negative electrode casing is as follows.First, SUS329J4L is the most weak when plate Be adsorbed in the degree of magnet, but if being processed into anode cover, be adsorbed in magnet.It addition, SUS304 does not inhales when plate Invest magnet, but if being processed into negative electrode casing, be weaker adsorbed in magnet.
In contrast, about the NM17 as non-magnetic stainless steel, even if even if being processed into positive pole when plate After shell and negative electrode casing, the most it is not adsorbed in magnet.
Result for various electrode materials is as follows.First, Ag2O and Zn as the material of silver oxide cell does not adsorbs In magnet.It addition, about LiCoO2 and Li4Ti5O12 in the positive electrode of lithium primary battery or lithium secondary battery, do not adsorb In magnet, but MnO2 or Li4Mn5O12 is weaker adsorbed in magnet.Li, C(carbon black in the negative material of battery and graphite) with And SiO is not adsorbed in magnet, but Si is weaker adsorbed in magnet.Activated carbon as the material of double-layer capacitor is not adsorbed in Magnet.
It addition, as reference, make magnet close in the case of Fe, be strongly adsorbed in magnet.
About electrode material, all it is more difficult to be adsorbed in magnet than Fe, more preferably uses the material not being adsorbed in magnet.
Additionally, the miscellaneous part used in the present embodiment has been also carried out research and has evaluated.Polyolefin or PTFE etc. are each Planting resin and be used for spacer 30, these resins are all non magnetic.It addition, as electrolyte 31, it is known that the alkali such as silver oxide cell What NaOH aqueous solution that property primary cell is used or KOH aqueous solution, lithium secondary battery or double-layer capacitor etc. were used makes LiPF6, TEABF4, SBPBF4 etc. support that salt is dissolved in the nonaqueous electrolytic solution of nonaqueous solvent, various ionic liquids etc., but are Making these liquid of magnet contact, magnet is also moistening, occurs without the situation being adsorbed in magnet especially in the way of stretching. It addition, the various resins such as polyethylene, polypropylene, polyphenylene sulfide, polyether-ether-ketone are used as the pad 32 as insulant, these Pad is not the most adsorbed in magnet.
Then, the double-layer capacitor 1 made for the composition by each embodiment of the application, evaluate magnet The electrical characteristics that have that it's too late of attachment.
(embodiment 1)
First, as embodiment 1, double-layer capacitor 1 is made by the 1st embodiment.Specifically, make as follows.
Anode cover 20 and negative electrode casing 10 use the corrosion resistant plate that NAS steel band (Na ス (strain)) is made, and NAS NM17 enters Go punch process.Negative electrode casing 10 possesses the bottom 10a of circle and side surface part 10b of the periphery connection along bottom 10a, is formed There is the recess of the peristome of circle.The side surface part that the anode cover 20 periphery by circular bottom 20a with along bottom 20a connects 20b forms the recess of the peristome with circle.The diameter of the peristome of side surface part 20b is than the external diameter shape larger of pad 32 Become, when the pad 32 embedding negative electrode casing 10 contacts with the bottom 20a of anode cover 20, by riveting side from outer circumferential side Portion 20b and seal.
About the 1st electrode the 11 and the 2nd electrode 21, make powder activated carbon, carbon black and politef mixed Molding, utilizes the conductive adhesive 12,22 being made up of carbon black and resin to bond to anode cover 20 and negative electrode casing 10, does Dry.Spacer 30 uses polyolefin micro porous polyolefin membrane.After making these parts be dried, under low dew point atmosphere, inject electrolyte 31, riveting sealing, thus, make double-layer capacitor 1.
(embodiment 2)
Then, as embodiment 2, double-layer capacitor 1 is made by the 2nd embodiment.Specifically, except will be by carbon After the protecting film 23 constituted is formed at the inner bottom surface of anode cover 20, utilize bonding 2nd electrode 21 of conductive adhesive Beyond Dian, make the most similarly to Example 1.
(comparative example)
As comparative example, in addition to being formed negative electrode casing by SUS304 and being formed anode cover by SUS329J4L, all with embodiment 1 Similarly make double-layer capacitor 1.
Fig. 8 represents each embodiment and the composition of comparative example and evaluation result.
(magnet test)
About magnet test, make samarium-cobalt magnet and the positive pole shell-side of double-layer capacitor 1 and negative electrode casing side contacts, will not be adsorbed in The situation of magnet is as O, using the situation that is weaker adsorbed in magnet as △, using the situation being adsorbed in magnet as × and comment Valency.
In embodiment 1 and embodiment 2, battery is not the most adsorbed in magnet, in contrast, in a comparative example, at positive pole Shell-side is adsorbed in magnet, also weaker adsorbs with magnet at negative pole shell-side.In these embodiments, as entirety, it is possible to as Nonmagnetic double-layer capacitor 1.
(electric capacity sustainment rate)
It addition, as electrical characteristics, according to following sequence evaluating electric capacity sustainment rate.
(1) electric capacity measures 1
After double-layer capacitor 1 being charged with 2.5V, with average electrode area 35mA/cm ＜ 2 ＞ (mark ＜ n ＞ Represent the index of n power) electric discharge, become the time of 40% according to from the 80% of charging voltage and calculate electric capacity C1.
(2) double-layer capacitor 1 is put into the temperature chamber of 40 DEG C ,+2.5V(is just connected) power supply be connected to anode cover 20, persistently charging 1 week.
(3) electric capacity measures 2
Electric capacity C2 is calculated by measuring 1 identical method with electric capacity.
(4) using electric capacity sustainment rate as C2/C1.
In embodiment 1 and comparative example, electric capacity sustainment rate is 0, in contrast, in example 2, it is shown that 92% high Electric capacity sustainment rate.This is because, by forming carbon protective film at anode cover 20 such that it is able to prevent the corrosion of anode cover, prevent The degradation of battery.Thereby, it is possible to as the high double-layer capacitor 1 of reliability.
Label declaration
1 electrochemical cell (double-layer capacitor)
10 negative electrode casings
Bottom 10a
10b side surface part
11 the 1st electrodes
12 conductive adhesives
13,14 protecting film
20 anode covers
Bottom 20a
20b side surface part
21 the 2nd electrodes
22 conductive adhesives
23,24 protecting film
30 spacers
31 electrolyte
32 pads
40～43 fusion points
50 connection members
60 positive terminals
70 negative terminals.

Claims (8)

1. an electrochemical cell, it is characterised in that possess:
Negative electrode casing；
Anode cover, seals with described negative electrode casing via insulant, forms receiving portion together with described negative electrode casing；
1st electrode, is disposed in described negative electrode casing in described accommodation section；
2nd electrode, is disposed in described anode cover in described accommodation section；
Spacer, is disposed between described 1st electrode and described 2nd electrode, makes both insulate；And
Electrolyte, is filled in described accommodation section,
Described negative electrode casing and described anode cover are non magnetic.
2. electrochemical cell as claimed in claim 1, it is characterised in that
Described negative electrode casing and described anode cover are by not carrying magnetic non-magnetic stainless steel to be formed because of plastic working.
3. electrochemical cell as claimed in claim 2, it is characterised in that
Described negative electrode casing and described anode cover are formed by high manganese stainless steel or high nickel and stainless steel.
4. the electrochemical cell as described in any one in claims 1 to 3, it is characterised in that
Described negative electrode casing and described anode cover are made up of bottom and side surface part,
Described negative electrode casing and at least one party of described anode cover, whole with the inside bottom surface of the bottom of described electrolyte contacts Face, is formed with the protecting film to described electrolyte with corrosion proof electric conductivity.
5. electrochemical cell as claimed in claim 4, it is characterised in that
Described protecting film forms the inner side surface to described side surface part.
6. the electrochemical cell as described in claim 4 or 5, it is characterised in that
Described protecting film based on carbon, aluminum, conduction DLC, electric conductive polymer any one.
7. the electrochemical cell with terminal, it is characterised in that
Possess the electrochemical cell as described in any one in claim 1 to 6, positive terminal and negative terminal,
Described positive terminal and described negative terminal are non magnetic.
8. the electrochemical cell with terminal as claimed in claim 7, it is characterised in that
Described positive terminal and described negative terminal are by not carrying magnetic non-magnetic stainless steel to be formed because of plastic working.
CN201610139287.5A 2015-03-12 2016-03-11 Electrochemical cell and electrochemical cell with terminal Pending CN105977404A (en)

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EP3067954A1 (en) 2016-09-14

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